Billet furnace



R. DAAE BILLET FURNACE Aug, 23, 1932.

Filed May 3, 1929 3 Sheets-Sheet l INVENTOR R.- DAAE BILLET FURNACE Filed Ma 3, 1929 Aug. 2 3, 1932.

3 Sheets-Sheet Z INY'ENTO w dr para 1.,

Patented Aug. 23, 1932 sunrise srarss nausea PATENT-11. OF IQE nnmnnnnr been, or .nouuesrown, onto "BILLET FURNACE Application filed May3, 1929. Serial No. 360,031.

invention relates to furnaces, more particularly to billet furnaces, and to mechanism for. advancing and withdrawing zbillets therefrom. 7

In ebillet furnaces as heretofore constru-cted, the floors-10f the heating chambers of the furnaces have generally fheen given slopes. Skids are provided 1011 the floors and extend from the entrance of the .fu-rnacetola position near the discharge end .of thefurna-ce. When billets, and particularly cylindrical billets such as are used for forming tubes and pipes,,are placed on these skids, the billets slide down theskids partially under' the'liufluence of the force of gravity towards tthe discharge end; A discharge mechanismggenerally in the form .of a ram,

discharges the 'biil-lets with an endwise motionsonto :a rnnaofitable.

As continued contact between the same 'areas .abidet :and :skids results in an 'un- The pusher is movable along aitrack substantial'ly paralleling one 'ofthe faces of the .fur mace. A. pusher bar is insertable into doors spaced along :the furnace for advancing the billets when they stickon the skids or the fur- However, the forward movement ofthe pusher has been limitedby reason of the presence of thefistationary run-off table. As a result, :a portion of the furnace near the discharge end has been inaccessible "to the pusher bar. Billets have therefore had to he rolled across this area by hand. Large bi llets occasionally require the efforts of at least four 'men forro'lling them across this small area and "into alignment'with the discharge ram.

I provide a furnace in which the discharge or roll-oif table is mounted on trucks so that itcan :be pushed away from in front of the furnace as the-pusher advances. This construction permits the pusher bar to have access to substantially the entire jfioor surface of the furnace and eliminates the need for manpower to advance the billets :throughthe last-portion of the furnace.

The roll-off table is mounted :on a truckwhich is positioned in the path oftheadvancing pusher. As the pusher moves into position to eng rge the truck carrying the roll-otf table, the latter is moved ahead of the pusher. In one form of the invention the truck carryingthe roll-0E table is coupledto the pusher so that the pusher on recedingfromthe discharge endof the furnace draws the roll-10ft table truck into position opposite the discharge ram, when it is uncoupled. In another form of the invention, the truck carrying the roll-off table is mounted cna support :or track extending at angle :to the support or track for the pusher so that the advancing "pusher shoves-the truck for the. roll-0E table .up an incline. Then as the pusher recedes, the roll-off table is automatically positioned infront of the discharge ram on account of the action of the force of gravity. Stop mechanism is providedfor auto-y inatically positioning the roll-ofi table :inthe correct position relativeto thedischarge ram. The accompanying drawings illustrate certain present preferred embodiments of the invention, in which Figure 1 is a planrview, partially in section, of a furnace and operating mechanism .enibodyingmy invention;

Figure 2is a similar View of a portion of the furnace and operating mechanism on an enlarged scale;

Figure 3 is a side elevational'view of the structure shown in Figure 1.;

Figure 4 is a plan'view, partiallyinsection,

of a modified form of furnace structure and operating mechanism;

Figure S5 is a similar view on anenlarged scale of a portion of the furnace;

Figure 6 1s aside elevat-ional view of the structure shown in F1gure-4; and

V ofthe billets interferes with subsequent opcharge end for a large portion of the length of the furnace. The length of the skids is such that the billets are well heated before they reach the ends thereof;

Beyond the ends of the skids the billets '4 roll and/or slide directly on the floor of the furnace in order to prevent the formation of dark or cold rings corresponding to their areas I of engagements with the skids 6.

Where skids extend throughout the entire length of the furnace, there is atendency for the portions of the billets Which engage the skids to remain cold, which condition'is exhibited by the'presence of dark spots or rings. The presence of such cold portions erations performed onthe billets. As the fioor 7 of the furnace is maintained at substantially a uniform temperature throughout its width, movement of the billets along the furnace on the floor avoids formation of such dark or cold areas on the billets. If

desired, aportion 8 of the floor 7 beyond the ends of the skids may be inclined more steep ly than other portions thereof. The dis charge end portion 9 of the furnace-is preferably substantially horizontal.

It is to'beunderstood that the furnace 2' is provided with the usual pipe lines for supplying air and removing products of combustion but as such ooeratin arts are well known in the art, a detailed showing thereof has been omitted. The furnace 2 terminates in a chamber 10 which may constitute a portion of the combustion chamber, or a mixing chamber, as desired.

- The front face of the furnace is provided with a number of doorsll through which access of the interior of the furnace is had. The rear face is likewise provided with doors 12 which are usually smaller than the doors 1; i 4

For advancing the billets 4 along the skids 6 and the floor 7 of the furnace, a pusher bar '14 is mounted on. a pusher truck 15 movable along a track 17 extending insubstantial parallelism with the forward face ofthe furnace 2. The pusher bar 14, as is well understood in the art, is mounted on the truck 15 in such manner that it is projectablethrough the doors 11 for engaging the billets 4. The pusher bar is also mounted on tracks 18 and 19 on the truck 15 so that it may be turned through an arc of a circle for better advancing the billets 4. A detailed showing of the pusher corresponding substantially to the pitch of the floor 7. lVhile T have illustrated the floor 7 as being inclined, it is to be understood that a it maybe made horizontal if desired, In the latter case the rack 17 is also placed in a horizontal position.

The billets 4are discharged fromthe furnace 2 with .a longitudinal movement by a ram 20 insertable through a door 21 near the rear end of the furnace. The ram 20 engages the ends of the billets 4 and projects them longitudinally through a door'22 in the other face of the furnace onto discharge rollers 24. The dischargev rollers 24 cooperate with other run-off rollers 25 mounted on a truck 26 which moves along the tracklT. The rollers 25 constitute .a'run-off table for billets discharged from the furnace. Heretofore it has been customary to provide a stationaryrun-off table opposite the discharge door 22. With such a construction the pusher truck 15 has not been able to advance the entire. length of the-furnace due to the engagement between theend' of the truck and the stationary roll-off table structure. By mounting the roll ofi table on a truck which is disposed in the path of movement of the pushertruck 15, the pusher truck mo'ves'th'e *truck carrying therrunoff table outof the way while operatingnear the discharge end of the furnace; V

- By having the pusherbar accessible to the discharge end of the furnace, the hand labor which has heretoforebeen required to roll the billets across the hitherto inaccessible portion of the furnacefloor is eliminated. In furnaces where the billetshave had to be rolled and/or skidded across portions of the furnace floor by hand owing to the inaccessibility of the pusher bar, the services of a considerable number of workmenhave been required. 7 r -1 i A coupling 27 connects the pusher truck 15 and the, truck 26 so that upon the with .drawal of the pusher truck, which is usually -done under its own power, the truck carrying the roll-off table is positioned so thatthe rollers 24 and 25 are in alignment. It is to be understood that the truck 26 may be provided withbraking mechanism, if necessary.

Referring'to- Figures 4, 5 and 6, wherein parts corresponding'to partsshown in Fig ures 1, 2 and 8 have been given the same reference numerals with a prime sufiix, the pusher truck 15 mounted on a track 17 engages a truck 26' carrying rollers 25' similar to the rollers 25 shown in the otherembodiment of the invention. In this form of the invention, the truck26 is mounted on a support in the form of a track' 28 which slopes upwardly from its forward end which is, slightly beyond a discharge door; 22,.in :the furnace 2.

bumper 29, thetruck 26 is automatically brought to restwith the rollers 25' in alignment with the rollers 24: Without requiring the manipulation of a coupling connection between the two trucks. 7 V

To cushion the shock between the trucks andto provide a rolling engagement therein, the truck 15, is provided with an arm or bracket 30 supporting a spring" 31 surrounding a shank 32- carrying 'a roller 33. V 7 While I have shown and described certain present preferred. embodiments of the invention, it is to be understood that itmay be otherwise embodied within the spirit of the invention and the scope of the appended claims. 1

Iclaim:.' 1" V 1. A furnace structure comprising a furnace, movable means for advancing material in. the furnace, means for discharging material: from the furnace, and a run-01f table for receiving the discharged material and movable with the material advancing means duringa. portion of'the movement of the latter..

2. The combination with a furnace and discharge mechanism therefor, of a gravity positioned run-off table .movable along a track, the track sloping upwardly toward the exitend of the-furnace. 1 r

3. A furnace structure comprising an. elongated furnace adapted for a rolling movement of billetstherethrough, a track extending along a face of the furnace means for advancing billets in the furnace and movable along said track, means for ejecting billets from the furnace in the direction of their major axes, and truckmounted'me'ans for receiving the billets discharged from the furnace, said receiving means being disposed in the path of the advancing means and, movable therewith through a portion of its movement.

4. A furnace structure comprising a furnace having a sloping floor,.means for advancing material in the furnace, atrack for supporting the advancing means, said track being substantially parallel to the floorrof said furnace, a run-off table'for material discharged from the furnace and a sloping track for supporting the run-01f table, said lastmentioned trackextending at an angle to the first-named track;

' 5-. A furnace structure comprising a furnace,.means: for dischargingsmaterial from" table in co-operative relation to the discharge 6;. A furnacestructure comprisingi a fu r{ nace, means for advancing material lengthwise through the furnace, a supporting track extending lengthwiseofthe furnace for the advancing means, a run-off table' for receiving materlal discharged from the furnace},

means for discharging the materialfrom the furnace to the run-oiftable, and a second I track for supporting the run-0E table, said tracksbeing so disposed thatthe material advancing means duringits travel willfengage and move the run-off table.

7 In. combination, amaterial housing chamber,means,for advancing material in said chamber, a track for supporting the advancing means, means for receiving material dischargedfrom said chamber, a sloping track forsupporting the receiving means, and stops-on said track for positioning the receiving means whereby, upon displacement, the receiving means returns to a predetermined position under theinfluence of the force of gravity. 7 7' .7 I g- 8. A furnace structure comprisinga furnace having a sloping surface, means for advancing' material along said surface, a sloping track extending in substantial parallelism to said floor for supporting said advancing means, a'dischargefdevicefor said furnace, a truck mounted receiving deviceco-operating with said discharge device, a supporting trackfor-said receiving device having an opposit/e slope to the first-mentioned track and crossingsa'id first-mentioned track near one end thereof whereby upon movement of-the advancing means in: one direction said receiving means is raised during movement along its co-oper'ating track, and means cooperating with, the second-mentioned track for limiting the return movement of the receiving means during'movement in a-reverse direction under the influence of the force ofgravity upon the withdrawal vofthe advancing means. r 9. A furnace structure comprising a furnace having a slopingsurface, means for advancing material along said surface, a sloping support extending insubstantial parallelism to said floor forsupporting saidadvancingmeans, a. discharge device for said furnace, truck mounted receiving device 00- V 1 operating with said discharge device, a support for said receiving device having an, op- 3 posite slope to the first-mentioned support and crossing said first-mentioned support near one end thereof whereby uponmovement of the advancing means in one direction said receiving means is raised: during movement along itsco-operating support, and

means co-operating with the second 'mentioned tracks for limiting the return movement of the receiving means during movement in a reverse'direction under the influence of the force of gravity upon the Withdrawal of the advancing means; I a

10. A furnace structure comprising a'furnace,a*run-oif table co-operating therewith a sloping track for supporting the run-o table and bumperson said track for automatically positioning the run-off table-rela tively to said furnace when said-table is moved under the influence of the force of gravity.-

11. A furnace structure comprising a-furnace having a discharge opening, movable means for progressively engaging and advancing material within'and lengthwise of the furnace to a position adjacent said opening, means for discharging material through said discharge opening, and movable means normally alined with said opening for receiving material discharged therethrough, said receiving means being movable by the material advancing means out of alinement with said opening during the portion of travel of thelmaterial advancing means effective for advancing material to saidopening.

a position adjacent 12. A furnace structure comprising a furnaceconstructed for the longitudinal travel therethrough of material to be heated, said furnace having a charging opening adjacent 'oneend, and a discharge opening adjacent the opposite end, a track extending" along one face of the furnace, means movable along said track for advancing material lengthwise of the furnace from said charging opening to a position adjacent said discharge opening, a movable run-oft normally alined with said discharge opening for. receiving discharged material from the furnace, and means for discharging the materialthrough the discharge opening onto the run-off, said run-off being disposed in the path of travel of the material advancing means along said track and movable therewith and thereby during that portion only of its movement effective for moving material into a position adjacent said discharge opening.-

13. A furnace structure comprisinga furnace having a charging opening adjacent one end and a discharge opening adjacent the opposite end, .a track extending along one face of the furnace, means movable along said track for advancing material lengthwise of the furnace from said charging opening to a position adjacent said discharge opening,

' truck mounted means normally adjacent said discharge opening forreceiving discharged material from the furnace, and means for discharging the material through the discharge opening onto the truck mounted means, said truck mounted means being disposed inxthe, path of travel ofthematerial advancing means along said track and en gageable' therewith and movable thereby through the portion of movement of the material advancing mea'ns 'efiective for advanc- Q ing'material to a positionadjacentsaid discharge openingq I 14-. A furnace structure comprising a'furnace having a charging openingadj acent one end and a' discharge opening adjacentthe V opposite end, a truck mounted pushing device for advancing material lengthwise of the furnace from'sald charging opening to a position adjacent said discharge opening,a truck mounted receiving device for receivv ing material discharged through said dis charge opening, and means for discharging the material through the discharge opening onto the truck mounted receiving device, said devices being both adapted for movement adjacent a common face of thefurnace and in'overlapping paths whereby one device is engaged-and moved by the other device during 'apredeterm-ined portion only of the travel of such other devices.

15:A furnace structure comprising a furnace having a charging opening and a discharge opemng and constructed for the travel of material lengthwise of the furnace from and effective during a portion only of its travel for engaging and moving the receiving means out of its normal co-operativeposition relative to the furnace.

elongated furnace 'havinga charging opening ad acent one endthereof and a discharge 16. A furnace structure comprising an opening adjacent/the opposite end, a truck mounted receiving device normally occupying a positlon ad acent said dlscharge open.-

' ing for receiving material discharged from the furnace therethrough, a ram for pushing the material from the furnace through the discharge opening onto the receiving device,

a truck mounted pusher bar'for advancing materiallengthwise of the furnacefrom' a position adjacent said charging opening to a position adjacent said discharge opening,

:said receiving device normally occupying an area through which saidvpusher bar must move in advancing material lengthwise of the furnace, and said pusher bar being accessible to substantially the entire floor surface of the furnace only upondisplacement of said receiving device fromsa-id area.

17. A billet furnace structure. comprising an elongated furnace having a discharge opening, a truck mounted run-off table, means for discharging material through said discharge opening ontothe run-off table, and truck mounted pusher bar normally operatively disconnected from the run-off table and disposed on the same side of the furnace as the run-off table and movable into the through an area normally occupied by said run-0E table upon movement of said pusher bar, for moving material throughout substantially the entire length of the furnace and into a position Where such material When sobmoved maybe received by said run-ofi' ta 1e.

my hand.

REINHARDT DAAE.

In testimony whereof I have hereunto set 

